2. Gamma Dose Rates in µSv/hour14-31 March Natural Background: 0.1 µSv/hour: continue to decrease
3. Measurements of the IAEA team March, 31- April 1, Fukushima Team1 and 2 1 April, FT2 and FT3 altogether as succession process. 7 different points of radius of 23 to 58 km from the Fukushima NPP Dose rates: 0.4 to 5 µSv/h Beta-gamma contamination: 0.01 to 0.49 MBq/m2 Several gamma spectra, air samples and smears collected No alpha particles detected in the air. 2 April, FT2 back to Tokyo, and then to Vienna March 31, Tokyo team 31st was the last day for Tokyo-team
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7. Monitoring of Workers29 March Nuclear and Industrial Safety Agency’s report: 106,095 people in Fukushima 102 above 100,000 counts per minute (cpm) Levels decreased after removal of clothes No cases that may influence health Among workers at Fukushima NPP: 20 workers exceeded 100mSv (Dose limit for emergency workers in life saving operation: 250 mSv)
8. Monitoring of drinking water28 March Recommendations for restrictions on drinking water being lifted in most locations. Recommendations for restrictions based on I-131 concentration remain in place in 4 locations of Fukushima prefecture.
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10. 98 of the 111 samples for various vegetables, fruit, seafood, various meats and unprocessed raw milk
11. in 8 prefectures (Chiba, Fukushima, Gunma, Ibaraki, Kanagawa, Niigata, Tochigi, and Tokyo),
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13. Discussion concerning soil The Japanese Agriculture Ministry has announced on 30 March the need to establish acceptable levels of radioactive Cs in soils to help farmers to decide whether to plant crops. Fukushima prefecture conducted a survey of soil from farmlands on 31 March.
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15. The team presented its report to the Japanese Cabinet Office, Ministry of Foreign Affairs, Ministry of Health, Labour and Welfare and the Ministry of Agriculture, Fisheries and Forestry on 31 March.
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17. Radioactivity in soil Bq/kg Average soil surface contamination Bq/m2 Radioactivity (Bq/kg)x Soil density (kg/m3)x sample depth (m) = Surface contamination (Bq/m2)